1 files changed, 123 insertions, 0 deletions
diff --git a/compilerplugins/clang/fieldcanbelocal.py b/compilerplugins/clang/fieldcanbelocal.py
new file mode 100755
index 000000000000..3266574445c5
--- /dev/null
+++ b/compilerplugins/clang/fieldcanbelocal.py
@@ -0,0 +1,123 @@
+#!/usr/bin/python3
+
+import re
+import io
+
+definitionSet = set()
+definitionToSourceLocationMap = dict()
+definitionToTypeMap = dict()
+touchedMap = dict()
+excludeSet = set()
+sourceLocationSet = set()
+
+# clang does not always use exactly the same numbers in the type-parameter vars it generates
+# so I need to substitute them to ensure we can match correctly.
+normalizeTypeParamsRegex = re.compile(r"type-parameter-\d+-\d+")
+def normalizeTypeParams( line ):
+    return normalizeTypeParamsRegex.sub("type-parameter-?-?", line)
+
+
+with io.open("workdir/loplugin.fieldcanbelocal.log", "r", buffering=1024*1024) as txt:
+    for line in txt:
+        tokens = line.strip().split("\t")
+        if tokens[0] == "definition:":
+            fieldInfo = (normalizeTypeParams(tokens[1]), tokens[2])
+            fieldType = tokens[3]
+            srcLoc = tokens[4]
+            # ignore external source code
+            if srcLoc.startswith("external/"):
+                continue
+            # ignore build folder
+            if srcLoc.startswith("workdir/"):
+                continue
+            definitionSet.add(fieldInfo)
+            definitionToTypeMap[fieldInfo] = fieldType
+            definitionToSourceLocationMap[fieldInfo] = srcLoc
+        elif tokens[0] == "touched:":
+            fieldInfo = (normalizeTypeParams(tokens[1]), tokens[2])
+            touchedByFunction = normalizeTypeParams(tokens[3])
+            touchedByFunctionSrcLoc = tokens[4]
+            if fieldInfo in excludeSet:
+                continue
+            if touchedByFunction == "Negative":
+                excludeSet.add(fieldInfo)
+                if fieldInfo in touchedMap:
+                    touchedMap.pop(fieldInfo)
+            elif fieldInfo in touchedMap:
+                if touchedMap[fieldInfo] != touchedByFunction:
+                    excludeSet.add(fieldInfo)
+                    touchedMap.pop(fieldInfo)
+            else:
+                touchedMap[fieldInfo] = touchedByFunction
+        else:
+            print( "unknown line: " + line)
+
+outputSet = set()
+for d in definitionSet:
+    if not d in touchedMap:
+        continue
+    fieldType = definitionToTypeMap[d]
+    # ignore some types that are known false+
+    if (fieldType.startswith("std::unique_ptr<")
+        or fieldType == "std::mutex"
+        or "Mutex" in fieldType
+        or "union" in fieldType
+        or "anonymous namespace" in fieldType
+        or "unnamed struct" in fieldType):
+        continue
+    # ignore some field names that are known false+
+    if (d[1] == "mbDisposing"
+        or d[1] == "bInDispose"
+        or d[1] == "m_bDisposing"
+        or d[1].startswith("m_bIn")):
+        continue
+    srcLoc = definitionToSourceLocationMap[d]
+    # ignore some types in the system libraries we somehow pick up
+    if srcLoc.startswith(".") or srcLoc.startswith("/") or srcLoc.startswith("lib/"):
+        continue
+    # part of the URE
+    if srcLoc.startswith("include/cppuhelper/"):
+        continue
+    # on-disk structures
+    if srcLoc.startswith("hwpfilter/"):
+        continue
+    if srcLoc.startswith("include/osl/"):
+        continue
+    if srcLoc.startswith("include/sal/"):
+        continue
+    if srcLoc.startswith("sw/source/filter/ww8/ww8struc.hxx"):
+        continue
+    if srcLoc.startswith("sd/source/filter/ppt/ppt97animations.hxx"):
+        continue
+    if srcLoc.startswith("lotuswordpro/"):
+        continue
+    if srcLoc.startswith("include/filter/msfilter/svdfppt.hxx"):
+        continue
+    if srcLoc.startswith("filter/source/graphicfilter/icgm/chart.hxx"):
+        continue
+    # most of this code is only compiled on windows, so we don't have decent results
+    if srcLoc.startswith("include/svl/svdde.hxx"):
+        continue
+    touchedByFunction = touchedMap[d]
+    outputSet.add((d[0] + " " + d[1] + " " + definitionToTypeMap[d], srcLoc, touchedByFunction))
+
+# sort the results using a "natural order" so sequences like [item1,item2,item10] sort nicely
+def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
+    return [int(text) if text.isdigit() else text.lower()
+            for text in re.split(_nsre, s)]
+# sort by both the source-line and the datatype, so the output file ordering is stable
+# when we have multiple items on the same source line
+def v_sort_key(v):
+    return natural_sort_key(v[1]) + [v[0]]
+
+# sort results by name and line number
+tmp1list = sorted(outputSet, key=lambda v: v_sort_key(v))
+
+# print out the results
+with open("compilerplugins/clang/fieldcanbelocal.results", "wt") as f:
+    for t in tmp1list:
+        f.write( t[1] + "\n" )
+        f.write( "    " + t[0] + "\n" )
+        f.write( "    " + t[2] + "\n" )
+
+